U.S. patent application number 14/389427 was filed with the patent office on 2015-02-26 for airbag module equipped seat.
This patent application is currently assigned to TS TECH CO., LTD. The applicant listed for this patent is TS TECH CO., LTD.. Invention is credited to Masaya Furuta, Jinichi Tanabe.
Application Number | 20150054261 14/389427 |
Document ID | / |
Family ID | 49260287 |
Filed Date | 2015-02-26 |
United States Patent
Application |
20150054261 |
Kind Code |
A1 |
Tanabe; Jinichi ; et
al. |
February 26, 2015 |
AIRBAG MODULE EQUIPPED SEAT
Abstract
Provided is an airbag module equipped seat that has high
attachment rigidity when a guide member for guiding the deployment
direction of an airbag module is attached to the airbag module by
using an attachment member. An airbag module equipped seat includes
a side frame that extends along a side portion of the seat, an
airbag module that is attached to the side frame, and a guide
member that is attached to a trim cover of the seat to guide the
deployment direction of the airbag module. The side frame includes
a plurality of side frame elements that extend along the side
portion of the seat and are connected to each other in at least one
position while facing each other, and the guide member is attached
to the side frame.
Inventors: |
Tanabe; Jinichi; (Tochigi,
JP) ; Furuta; Masaya; (Tochigi, JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
TS TECH CO., LTD. |
Asaka-shi, Saitama |
|
JP |
|
|
Assignee: |
TS TECH CO., LTD
Asaka-shi, Saitama
JP
|
Family ID: |
49260287 |
Appl. No.: |
14/389427 |
Filed: |
March 28, 2013 |
PCT Filed: |
March 28, 2013 |
PCT NO: |
PCT/JP2013/059305 |
371 Date: |
September 30, 2014 |
Current U.S.
Class: |
280/728.2 |
Current CPC
Class: |
B60R 21/26 20130101;
B60N 2/986 20180201; B60R 21/207 20130101; B60N 2002/5808 20130101;
B60R 21/16 20130101 |
Class at
Publication: |
280/728.2 |
International
Class: |
B60R 21/207 20060101
B60R021/207; B60R 21/26 20060101 B60R021/26 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 30, 2012 |
JP |
2012-081256 |
Claims
1. A seat, comprising: a side frame that extends along a side
portion of the seat; an airbag module for storing an airbag, the
airbag module being attached to the side frame; and a guide member
that is attached to a trim cover of the seat and guides a
deployment of the airbag in a deployment direction, wherein: the
side frame comprises a plurality of side frame elements that extend
along the side portion of the seat and are connected to each other
in at least one position while facing each other; and the guide
member is attached to the side frame.
2. The seat according to claim 1, wherein: the side frame comprises
a concave portion used to attach the guide member thereto; and the
guide member is connected to an attachment member that comprises a
connecting portion connected to one-side end of the guide member
and a connection portion connected to the concave portion of the
side frame.
3. The seat according to claim 2, wherein: the side frame is formed
in a hollow closed section structure with a pair of walls
connecting a pair of the side frame elements at front and rear
sides of the seat; and the concave portion is an attachment
hole.
4. The seat according to claim 2, further comprising: a rotation
suppressing portion that suppresses rotation of the attachment
member with respect to the side frame located between the
attachment member and the side frame.
5. The seat according to claim 3, wherein the attachment member
comprises a retaining portion that suppresses disengagement of the
attachment member from the attachment hole.
6. The seat according to claim 1, wherein one-side end of the guide
member is stored in a space surrounded by the side frame elements
of the side frame.
7. The seat according to claim 5, wherein: each of the pair of the
side frame elements comprises a pair of walls comprising: an outer
wall which is located at an outside of the seat to attach the
airbag module thereto; and an inner wall which is located at an
inside of the seat to face the outer wall, wherein each of the pair
of walls comprises front and rear walls which are located at the
front side and the rear side of the seat to connect the inner wall
and the outer wall to each other, wherein: the attachment hole is
formed in the inner wall of the side frame; and the connection
portion of the attachment member is a groove that sandwiches the
wall at the front side of the seat in the attachment hole.
8. The seat according to claim 7, wherein: the attachment member
comprises: an outer wall contact surface which comes into contact
with an inner surface of the outer wall of the side frame; and a
front wall contact surface which comes into contact with an inner
wall of the front wall of the side frame, and the retaining portion
is formed as a protrusion that comes into contact with an inner
surface of a rear end of the attachment hole.
9. The seat according to claim 3, wherein: the attachment hole is
formed at a position where the plurality of the side frame elements
facing each other are connected to each other; and the connection
portion of the attachment member is a groove that sandwiches a wall
of the airbag module attachment side surface of the attachment
hole.
10. The seat according to claim 8, wherein: the connecting portion
is formed as a retaining space that separably retains one-side end
of the guide member therein; the attachment member comprises: a
slit that extends from the retaining space to an outer surface of
the attachment member and communicates with the retaining space to
form a passage of the guide member; an outer wall contact surface
that forms an outer wall of the retaining space and comes into
contact with the inner surface of the outer wall of the side frame,
and an upright wall that is uprightly formed from the outer wall
contact surface toward the inner wall of the side frame and forms
an outer wall of the slit, and wherein a portion that is continuous
from the outer wall contact surface to the upright wall is stored
in a hollow space inside the side frame.
11. The seat according to claim 3, wherein a plurality of the
attachment holes are provided.
Description
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application is the U.S. national phase of the
International Patent Application No. PCT/JP2013/059305, filed Mar.
28, 2013, which claims the benefit of the Japanese Patent
Application No. 2012-081256, filed Mar. 30, 2012, the entire
content being incorporated herein by reference.
BACKGROUND
[0002] Disclosed herein is an airbag module equipped seat, and
particularly, an airbag module equipped seat in which an end of a
guide member for guiding the deployment direction of an airbag is
attached to a side frame.
[0003] Hitherto, as an airbag module equipped seat, there has been
proposed a seat in which an airbag module is attached to a side
frame of a seat back frame, ends of a trim cover and one-side ends
of two stay cloths are sewn together to form a fracture portion of
the trim cover, the airbag module is enclosed by two stay cloths
drawn into the trim cover from the fracture portion, and the entire
seat back including the airbag module is covered by the trim cover
(see, for example, Japanese Patent No. 4560659 ("the '659
Patent")).
[0004] In the '659 Patent, a module cover that stores the airbag
module therein is provided with a bar-shaped locking pin extending
in the up and down direction, and a suspension hook is connected to
an end opposite to the fracture portion of the stay cloth extending
from the fracture portion of the trim cover. The end opposite to
the fracture portion of the stay cloth is connected and fixed to
the module cover in a manner such that the suspension hook is
locked to the locking pin of the module cover.
[0005] According to the invention of the '659 Patent, the stay
cloth may be pulled into a hollow portion from an opening edge of a
back pad, and a suspension hook of a trim code may be locked to the
locking pin of the module cover at the inside of the hollow
portion. Thus, the stay cloth may be simply assembled in a compact
size.
[0006] However, in the invention of the '659 Patent, the suspension
hook is locked to the locking pin provided in the module cover.
Since the module cover is formed by resin molding or the like in
many cases as in the '659 Patent, there has been a desire to
improve the rigidity of a member to which the suspension hook is
attached.
[0007] Further, since the stay cloth is attached to the airbag
module by using an attachment member like the suspension hook, the
attachment workability is good, the separation of the attachment
member hardly occurs, the periphery of an attachment mechanism is
compactly housed in the cushion pad, and the periphery of the
attachment mechanism is compact.
SUMMARY
[0008] The various embodiments of the invention described herein
are made in view of the above-described problem, and an object is
to provide an airbag module equipped seat having high attachment
rigidity when a guide member for guiding the deployment direction
of an airbag module is attached to the airbag module by using an
attachment member.
[0009] Another object is to provide an airbag module equipped seat
in which a guide member for guiding the deployment direction of an
airbag module is attached to the airbag module by using an
attachment member and which has features that attachment
workability is good, the separation of the attachment member hardly
occurs, the periphery of an attachment mechanism is compactly
stored in a cushion pad, and the periphery of the attachment
mechanism is compact.
[0010] According to an airbag module equipped seat of a first
embodiment, the above-described problem is solved by a seat
comprising: a side frame that extends along a side portion of the
seat; an airbag module for storing an airbag, the airbag module
being attached to the side frame; and a guide member that is
attached to a trim cover of the seat and guides a deployment of the
airbag in a deployment direction, wherein the side frame includes a
plurality of side frame elements that extend along the side portion
of the seat and are connected to each other in at least one
position while facing each other, and wherein the guide member is
attached to the side frame.
[0011] In this way, since the guide member is attached to the side
frame including the plurality of side frame elements extending
along the side portion of the seat, facing each other, and
connected to each other in at least one position, the guide member
may be attached to the side frame including the plurality of side
frame elements connected to each other in at least one position,
and hence the guide member may be attached by a compact
configuration.
[0012] In a second embodiment, the side frame may include a concave
portion used to attach the guide member thereto, and the guide
member may be connected to an attachment member that includes a
connecting portion connected to one-side end of the guide member
and a connection portion connected to the concave portion of the
side frame.
[0013] In this way, since the attachment member is connected to the
concave portion, the attachment member may be compactly
disposed.
[0014] Further, since the guide member is connected to the
attachment member including the connecting portion connected to
one-side end of the guide member and the connection portion locked
to the concave portion of the side frame, only the concave portion
may be formed in the side frame, and hence a change in the shape of
the side frame equipped with the guide member may be minimized.
[0015] Further, since the attachment member includes the connecting
portion connected to one-side end of the guide member and the
connection portion connected to the concave portion of the side
frame, the side frame and the guide member may be reliably and
promptly fastened to each other.
[0016] Moreover, since the attachment member is connected to the
side frame by the connection to the concave portion, the position
of the attachment target is defined in the up and down direction
and the right and left direction by the concave portion, and hence
the attachment target position may be easily designed. Further, the
disengagement of the attachment member with respect to the
attachment target hardly occurs in the attachment state, and hence
a separate positioning structure does not need to be provided.
[0017] In a third embodiment, the side frame may be formed in a
hollow closed section structure with a pair of walls connecting a
pair of the side frame elements at front and rear sides of the
seat, and the concave portion may be an attachment hole.
[0018] In this way, since the side frame with a hollow closed
section structure includes the attachment hole for attaching the
guide member, the guide member may be attached to the side frame
having a hollow closed section structure, and hence the guide
member may be compactly attached.
[0019] In a fourth embodiment, the seat further comprises a
rotation suppressing portion that suppresses rotation of the
attachment member with respect to the side frame located between
the attachment member and the side frame.
[0020] The attachment member may easily rotate by a large force
generated by the deployment of the airbag. However, since the
rotation suppressing portion that suppresses the rotation of the
attachment member relative to the side frame is provided between
the attachment member and the side frame, the rotation of the
attachment member is suppressed even when the attachment member is
used for the connection between the guide member and the side
frame.
[0021] In a fifth embodiment, the attachment member may include a
retaining portion that suppresses the disengagement of the
attachment member from the attachment hole.
[0022] With such a configuration, the separation of the attachment
member from the attachment hole may be suppressed even when the
attachment member is used for the connection between the guide
member and the side frame.
[0023] In a sixth embodiment, one-side end of the guide member may
be stored in a space surrounded by the side frame elements of the
side frame.
[0024] With such a configuration, since the interference between
one-side end of the guide member and the other component is
suppressed, the separation of the guide member from the side frame
or the damage of one-side end side of the guide member may be
suppressed.
[0025] In a seventh embodiment, each of the pair of the side frame
elements may include an outer wall which is located at an outside
of the seat to attach the airbag module thereto and an inner wall
which is located at an inside of the seat to face the outer wall,
and each of the pair of walls may include front and rear walls
which are located at the front side and the rear side of the seat
to connect the inner wall and the outer wall to each other.
Further, the attachment hole may be formed in the inner wall of the
side frame, and the connection portion of the attachment member may
be a groove that sandwiches the wall at the front side of the seat
in the attachment hole.
[0026] In this way, since the attachment hole is formed in the
inner wall facing the outer wall equipped with the airbag module, a
predetermined space may be formed between the airbag module and the
attachment member, and hence the deployment direction of the airbag
may be more stably guided during the deployment of the airbag by
the guide member.
[0027] In an eighth embodiment, the attachment member may include
an outer wall contact surface which comes into contact with an
inner surface of the outer wall of the side frame and a front wall
contact surface which comes into contact with an inner wall of the
front wall of the side frame, and the retaining portion may be
formed as a protrusion that comes into contact with an inner
surface of a rear end of the attachment hole.
[0028] With such a configuration, the separation of the attachment
member may be suppressed particularly during the deployment of the
airbag.
[0029] In a ninth embodiment, the attachment hole may be formed at
a position where the plurality of facing side frame elements are
connected to each other, and the connection portion of the
attachment member may be a groove that sandwiches a wall of the
airbag module attachment side surface of the attachment hole.
[0030] In this way, since the attachment hole is formed at the
frame connection position having high rigidity, the attachment
member may be attached to a highly rigid position, and hence the
attachment member support rigidity is improved.
[0031] In a tenth embodiment, the connecting portion may be formed
as a retaining space that separably retains the one-side end of the
guide member therein, the attachment member may include a slit that
extends from the retaining space to an outer surface of the
attachment member and communicates with the retaining space to form
a passage of the guide member, an outer wall contact surface that
forms an outer wall of the retaining space and comes into contact
with the inner surface of the outer wall of the side frame, and an
upright wall that is uprightly formed from the outer wall contact
surface toward the inner wall of the side frame and forms an outer
wall of the slit, and a portion that is continuous from the outer
wall contact surface to the upright wall may be stored in a hollow
space inside the side frame.
[0032] In this way, since a portion continuous to the upright wall
from the outer wall contact surface forming a portion from the
retaining space as the passage of the guide member to the slit is
stored in the hollow space inside the side frame, the interference
of the passage of the guide member with respect to the other
component is suppressed, and hence the damage of the guide member
may be suppressed.
[0033] In an eleventh embodiment, a plurality of the attachment
holes may be provided.
[0034] With such a configuration, since the guide member may be
connected to a plurality of positions of the side frame having a
closed section structure, the deployment direction of the airbag
may be more stably guided by the guide member during the deployment
of the airbag.
[0035] According to the first embodiment, since the side frame
including the plurality of side frame elements extending along the
side portion of the seat, facing each other, and connected to each
other in at least one position includes the concave portion used to
attach the guide member, the guide member may be attached to the
side frame having a hollow closed section structure, and hence the
guide member may be attached by a compact configuration.
[0036] According to the second embodiment, since the attachment
member is connected to the concave portion, the attachment member
may be compactly disposed.
[0037] Further, since the guide member is connected to the
attachment member including the connecting portion connected to
one-side end of the guide member and the connection portion locked
to the concave portion of the side frame, a change in the shape of
the side frame equipped with the guide member may be minimized.
[0038] Further, since the attachment member includes the connecting
portion connected to one-side end of the guide member and the
connection portion connected to the concave portion of the side
frame, the side frame and the guide member may be reliably and
promptly fastened to each other.
[0039] Moreover, since the attachment member is connected to the
side frame by the connection to the concave portion, the position
of the attachment target is defined in the up and down direction
and the right and left direction by the concave portion, and hence
the attachment target may be easily designed. Further, the
disengagement of the attachment member with respect to the
attachment target hardly occurs in the attachment state, and hence
a separate positioning structure does not need to be provided.
[0040] According to the third embodiment, since the side frame with
a hollow closed section structure includes the attachment hole for
attaching the guide member, the guide member may be attached to the
side frame having a hollow closed section structure, and hence the
guide member may be compactly attached.
[0041] According to the fourth embodiment, the attachment member
may easily rotate by a large force generated by the deployment of
the airbag. However, since the rotation suppressing portion that
suppresses the rotation of the attachment member relative to the
side frame is provided between the attachment member and the side
frame, the rotation of the attachment member is suppressed even
when the attachment member is used for the connection between the
guide member and the side frame.
[0042] According to the fifth embodiment, the separation of the
attachment member from the attachment hole may be suppressed even
when the attachment member is used for the connection between the
guide member and the side frame.
[0043] According to the sixth embodiment, since the interference
between one-side end of the guide member and the other component is
suppressed, the separation of the guide member from the side frame
or the damage of one-side end side of the guide member may be
suppressed.
[0044] According to the seventh embodiment, since the attachment
hole is formed in the inner wall facing the outer wall equipped
with the airbag module, a predetermined space may be formed between
the airbag module and the attachment member, and hence the
deployment direction of the airbag may be more stably guided during
the deployment of the airbag by the guide member.
[0045] According to the eighth embodiment, the separation of the
attachment member may be suppressed particularly during the
deployment of the airbag.
[0046] According to the ninth embodiment, since the attachment hole
is formed at the frame connection position having high rigidity,
the attachment member may be attached to a highly rigid position,
and hence the attachment member support rigidity is improved.
[0047] According to the tenth embodiment, since a portion
continuous to the upright wall from the outer wall contact surface
forming a portion from the retaining space as the passage of the
guide member to the slit is stored in the hollow space inside the
side frame, the interference of the passage of the guide member
with respect to the other component is suppressed, and hence the
damage of the guide member may be suppressed.
[0048] According to the eleventh embodiment, since the guide member
may be connected to a plurality of positions of the side frame
having a closed section structure, the deployment direction of the
airbag may be more stably guided by the guide member during the
deployment of the airbag.
BRIEF DESCRIPTION OF THE DRAWINGS
[0049] FIG. 1 is a perspective view illustrating an appearance of
an airbag module equipped seat according to an embodiment.
[0050] FIG. 2 is a perspective view illustrating a seat frame of
the airbag module equipped seat according to the embodiment.
[0051] FIG. 3 is a perspective view illustrating a side frame
according to the embodiment.
[0052] FIG. 4 is a cross-sectional view taken along the line A-A of
FIG. 1.
[0053] FIG. 5 is an explanatory perspective view illustrating a
state where a trim cover and a stay cloth according to the
embodiment are sewn together at a fracture portion.
[0054] FIG. 6 is a perspective view illustrating an attachment
member according to the embodiment.
[0055] FIG. 7 is a perspective view illustrating a side frame
according to another embodiment.
[0056] FIG. 8 is a cross-sectional view taken along the line A-A of
FIG. 1 and is an explanatory view illustrating the case where a
side frame and an attachment member according to another embodiment
are used.
[0057] FIG. 9 is a perspective view illustrating an attachment
member according to another embodiment.
[0058] FIG. 10 is a cross-sectional view taken along the line A-A
of FIG. 1 in the case where a side frame according to still another
embodiment is applied.
DETAILED DESCRIPTION
[0059] A structure of an attachment portion which attaches an end
of a guide member for guiding the deployment direction of an airbag
module to an attachment target is described below.
[0060] The guide member is a sheet member that has a limited
stretchable property compared to a skin material. An example of the
guide member includes a stay cloth of which one-side end is sewn to
a fracture portion formed in a skin material or the like at a
position for storing an airbag module and which transmits a force
generated by the deployment of an airbag to the fracture portion to
promote the deployment of the airbag or a stay cloth which is
disposed between the airbag module and the other component so that
the other component, such as a cushion pad, is not damaged by a
force generated by the expansion of the airbag during the
deployment of the airbag.
[0061] Hereinafter, an airbag module equipped seat according to the
embodiment will be described with reference to FIGS. 1 to 10.
[0062] An airbag module equipped seat S according to this
embodiment includes a seat back S1, a seat portion S2, and a
headrest S3 as illustrated in FIG. 1.
[0063] A seat frame F illustrated in FIG. 2 is provided inside the
airbag module equipped seat S. The seat frame F includes a seat
back frame 1 as a frame of the seat back S1 and a seat frame 2 as a
frame of the seat portion S2. The seat frame 2 and the seat back
frame 1 are connected to each other through a reclining mechanism
3. The seat back S1 and the seat portion S2 are formed by providing
a cushion and a trim cover at the outside of the seat back frame 1
and the seat frame 2.
[0064] As illustrated in FIGS. 1 to 4, the seat back S1 mainly
includes the seat back frame 1, a cushion pad 5 which is placed on
the seat back frame 1, a trim cover 4 which covers the seat back
frame 1 and the cushion pad 5, and a stay cloth 32 of which
one-side end is sewn to a fracture portion 40 of the trim cover
4.
[0065] As illustrated in FIGS. 1 and 2, the seat back frame 1 is
formed in a frame shape by including the side frames 10 which are
separated from each other in the right and left direction and
extend in the up and down direction, an upper frame 21 which
connects the upper ends of the side frame 10 to each other, and a
lower frame 22 which connects the lower ends thereof to each
other.
[0066] The upper frame 21 is provided with a pillar support portion
23, and the pillar support portion 23 is provided with a headrest
frame (not illustrated). The headrest S3 is formed by providing a
cushion member at the outside of the headrest frame.
[0067] As illustrated in FIGS. 3 and 4, the side frame 10 includes
an outer frame 11 and an inner frame 12 which are formed to have a
shallow U-shaped cross-section.
[0068] As illustrated in FIGS. 3 and 4, each of the outer frame 11
and the inner frame 12 is formed of a resin molding material, and
is formed to have a shallow U-shaped cross-section in which front
walls 11b and 12b and rear walls 11c and 12c are uprightly formed
in the perpendicular direction from the front and rear ends of
plate-like outer and inner walls 11a and 12a. As illustrated in
FIG. 3, in the outer wall 11a and the inner wall 12a, the rear
edges continuous to the rear walls 11c and 12c are perpendicular to
the upper edge and the lower edge, and the front edges continuous
to the front walls 11b and 12b protrude forward, so that the upper
ends thereof move away from the rear walls 11c and 12c in relation
to the lower ends thereof.
[0069] The end surfaces of the front wall 11b of the outer frame 11
and the front wall 12b of the inner frame 12 and the end surfaces
of the rear wall 11c of the outer frame 11 and the rear wall 12c of
the inner frame 12 are fixed to one another while coming into
contact with one another, and the outer frame 11 and the inner
frame 12 form the side frame 10 having a hollow closed section
structure, as a whole.
[0070] Furthermore, in this embodiment, the side frame 10 is formed
of a resin molding material, but a structure may be employed in
which the outer frame 11 and the inner frame 12 are formed by
bending a metallic plate and the end surfaces of the front wall 11b
of the outer frame 11 and the front wall 12b of the inner frame 12
and the end surfaces of the rear wall 11c of the outer frame 11 and
the rear wall 12c of the inner frame 12 are welded and fixed to one
another in an abutting state.
[0071] A space which is surrounded by the outer wall 11a, the inner
wall 12a, the front walls 11b and 12b, and the rear walls 11c and
12c corresponds to a hollow space inside the side frame of
embodiments and a space surrounded by the frame of the side frame.
Further, the outer frame 11 and the inner frame 12 correspond to
the plurality of side frame elements of embodiments, and the front
walls 11b and 12b and the rear walls 11c and 12c correspond to the
positions where the plurality of side frame elements of embodiments
are connected to one another.
[0072] A rectangular attachment hole 12h is provided at two
positions close to the front wall 12b in the inner wall 12a of the
inner frame 12. Although it is difficult to form an elongated hole
along a curved edge like the side end edge of the front wall 12b of
the inner wall 12a, the attachment hole may be simply formed in
that the attachment hole 12h is not formed as an elongated hole and
short rectangular holes are formed at a plurality of positions.
[0073] An elongated hole 12s which extends in parallel to the rear
wall 12c is formed in the vicinity of the center of the side frame
10 in the length direction at a position close to the rear wall
12c. Since the side end edge of the rear wall 12c of the inner wall
12a has a linear shape and a continuous elongated hole may be
easily formed, the attachment hole near the rear wall 12c is formed
as a continuous elongated hole.
[0074] In this way, since an attachment target of an attachment
member 50 is formed as a hole, it is possible to minimize a change
in the shape of the side frame used to attach the guide member.
[0075] In this embodiment, the attachment holes 12h are formed in
parallel to each other in the extension direction of the front wall
12b substantially corresponding to the up and down direction of the
seat S, but the present invention is not limited thereto.
[0076] A configuration may be employed in which an outer stay cloth
(not illustrated) is provided to pass between the rear surface of
the airbag module 6 and the rear cushion pad 5 other than the stay
cloth 32, a pair of attachment holes like the attachment holes 12h
is provided at two positions close to the rear wall 12c of the
inner wall 12a instead of the elongated hole 12s of the side frame
10, and the outer stay cloth is attached to the attachment holes
through the attachment member 50. In this case, the pair of
attachment holes 12h is formed in parallel to each other even in
the front to back direction of the seat S.
[0077] The attachment holes 12h are formed at the positions where
the width of the inner wall 12a in the front to back direction of
the seat S is wider than that of the vicinity of the upper end
instead of the vicinity of the upper end of the side frame 10
having a narrow width in the front to back direction of the seat S.
With such a configuration, since the attachment holes 12h are
formed at the positions with a large space, a space may be
effectively used and an increase in the size of the attachment
position of the stay cloth 32 may be suppressed.
[0078] The width of the attachment hole 12h in the front to back
direction of the seat S is set to be larger than the width of the
elongated hole 12s in the front to back direction of the seat
S.
[0079] The outer wall 11a of the side frame 10 is provided with
attachment holes for the other components like bolt holes to which
bolts 18 for fixing the airbag module 6 are attached, but the
attachment holes 12h and the elongated hole 12s are formed at
different positions from these other attachment holes in the front
to back direction of the seat S. With such a configuration,
degradation in the rigidity of the side frame 10 may be
suppressed.
[0080] Further, as illustrated in FIG. 4, in this embodiment, the
bolt 18 is provided at a position close to the elongated hole 12s.
For this reason, when a locking member 33 is loosened, the locking
member 33 comes into contact with the bolt 18, and hence the
separation of the locking member 33 is suppressed. Furthermore, a
configuration may be employed in which the bolt 18 is provided at a
position close to the attachment hole 12h to suppress the
separation of the attachment member 50.
[0081] Furthermore, a rib which extends in the length direction of
the front wall 12b may be formed at the slightly rear position of
the seat S than two attachment holes 12h on the surface facing the
outer wall 11a in the inner wall 12a. For example, the rib may be
formed as an elongated protrusion having a rectangular
cross-section. In this way, since the rib is formed, the rigidity
in the vicinity of the attachment hole 12h may be improved.
[0082] The airbag module 6 is fixed to the side frame 10.
[0083] The airbag module 6 of this embodiment is formed as a
caseless airbag module without a module case. As illustrated in
FIG. 4, the airbag module 6 includes an inflator 6a, a folded
airbag 6b, a retainer 6c which retains the inflator 6a, and a
wrapping material 6d which wraps the airbag 6b.
[0084] The outer peripheral portion of the inflator 6a is fixed to
the retainer 6c and the side frame 10 by the bolt 18 which is
uprightly formed toward the inside of the seat S.
[0085] The inflator 6a is disposed inside the airbag 6b, and the
airbag 6b is deployed toward the front side of the seat S by a gas
discharged from the inflator 6a.
[0086] The airbag 6b is retained in a folded state by the wrapping
material 6d formed as a cloth bag, and the wrapping material 6d is
easily torn when the airbag 6b is deployed.
[0087] Furthermore, in this embodiment, the airbag module 6 is
formed in a caseless type, but the present invention is not limited
thereto. For example, an airbag module with a module case may be
provided.
[0088] As illustrated in FIG. 4, the cushion pad 5 is provided with
a space 7 for storing the airbag module 6.
[0089] The trim cover 4 is formed of a known material, and is sewn
in a bag shape by sewing a front surface gusset portion 41
enclosing right and left bank surfaces from the center of the seat
surface to a side surface gusset portion 42 reaching a back surface
from a peripheral surface and further connecting a back surface
gusset portion (not illustrated) to the side surface gusset portion
42 to be openable and closeable by a slider fastener (not
illustrated) as illustrated in FIGS. 4 and 5.
[0090] The trim cover 4 is provided with the fracture portion 40
which is formed at the bulged peak points of the bank portions of
the front surface gusset portion 41 and the side surface gusset
portion 42. The fracture portion 40 sews the ends of the front
surface gusset portion 41 and the side surface gusset portion 42 to
each other so that the fracture portion may be broken by a tensile
force generated by the expansion of the airbag while the strength
endurable for the normal use is maintained.
[0091] As illustrated in FIG. 5, an end edge 42e opposite to the
fracture portion 40 in the side surface gusset portion 42 is formed
so that an area in the vicinity of the center thereof is longer
than an area at both sides thereof, and the elongated locking
member 33 formed of a resin material and having a substantially
J-shaped cross-section is sewn thereto. The locking member 33 is
used to lock the center area of the end edge 42e to the elongated
hole 12s of the side frame 10.
[0092] Further, the stay cloth 32 is sewn to the fracture portion
40.
[0093] The stay cloth 32 is formed of a less stretchable cloth
material, and is used to transmit a stress generated by the
expansion of the airbag to the fracture portion 40. The stay cloth
32 corresponds to the guide member of embodiments.
[0094] As illustrated in FIG. 5, the stay cloth 32 is formed as a
substantially trapezoid cloth so that an edge 34 near the fracture
portion 40 is substantially parallel to an edge 35 facing the
fracture portion 40 and the edge 34 near the fracture portion 40 is
long. A plurality of attachment portions 36 used to attach trim
plates 37 protruding in a rectangular shape are provided in the
vicinity of both ends of the edge 35 facing the fracture portion
40.
[0095] The trim plate 37 is a rectangular plate body which is
formed of a rigid resin material. The trim plate 37 is a stay cloth
end shape maintaining member that is used to maintain the shape of
the end of the attachment portion 36 of the stay cloth 32. Since
the trim plate 37 is fixed to the end of the stay cloth 32, it is
possible to improve the workability when the end of the stay cloth
32 is inserted into a locking part 55. In this embodiment, the trim
plate 37 is fixed to the attachment portion 36 of the stay cloth
32, but the present invention is not limited thereto. For example,
the trim plate 37 may not be used, and a portion which is formed by
folding the end of the attachment portion 36 of the stay cloth 32 a
plurality of times and sewing the folded portion or a portion which
is formed by winding the end of the attachment portion as a
plurality of plies and sewing the plies may be inserted into the
locking part 55 of the attachment member 50 while one side of the
portion is crushed.
[0096] As illustrated in FIG. 4, the stay cloth 32 is pulled into
the space 7 from the fracture portion 40. The trim plate 37 which
is fixed to the attachment portion 36 of the stay cloth 32 is
locked to the attachment hole 12h of the inner wall 12a of the
inner frame 12 through the attachment member 50.
[0097] Further, the locking member 33 which is sewn to the center
area of the end edge 42e opposite to the fracture portion 40 in the
side surface gusset portion 42 is locked to the elongated hole 12s
of the inner wall 12a in the inner frame 12.
[0098] The attachment member 50 is integrally formed of a rigid
resin. As illustrated in FIG. 6, the attachment member includes a
wide portion 51 which has a substantially rectangular
cross-sectional shape substantially following a shape of an inner
surface of a portion having a J-shaped cross-section reaching the
rear wall 11a while passing from the inner wall 12a of the side
frame 10 to the front walls 12b and 11b, a locking portion 52 which
is formed near the inner wall 12a in the wide portion 51, and an
extension portion 54 which is formed, so that the end opposite to
the wide portion 51 in the locking portion 52 extends toward the
extension side of the stay cloth 32 and is covered by the outer
surface of the inner wall 12a at the inside of the seat S. The
attachment member 50 has a substantially uniform cross-sectional
shape in the extension direction of the side frame 10.
[0099] In the locking portion 52, a groove 53 which extends from
the wide portion 51 to lock the attachment member 50 to the inner
wall 12a is formed at the side of the inner wall 12a of the wide
portion 51. The groove 53 is formed as a space between the wide
portion 51 and the extension portion 54 extending from the base
portion of the wide portion 51. The groove 53 is attached to the
end of the attachment hole 12h at the front side of the seat S, and
sandwiches the inner wall 12a.
[0100] The wide portion 51 includes a front wall contact surface 56
which is perpendicular to the depth direction of the groove 53 and
a rear wall contact surface 57 which is perpendicular to the front
wall contact surface 56 and is parallel to the depth direction of
the groove 53.
[0101] The wide portion 51 includes the locking part 55 which locks
the trim plate 37 while retaining the trim plate therein and first
and second walls 59 and 60 which form both wall surfaces of a slit
69 used as a passage for the stay cloth 32 drawn out from the
locking part 55. The second wall 60 corresponds to the upright wall
of the embodiments.
[0102] The outer surface of the second wall 60 is parallel to the
front wall contact surface 56 and is perpendicular to the rear wall
contact surface 57. The outer surface of the second wall 60 is
provided with a protrusion 60a of which a portion near the rear
surface contact surface 57 protrudes outward and which serves as a
step. The protrusion 60a extends from the upper end of the
attachment member 50 to the lower end thereof, and is formed in a
linear shape in the side view.
[0103] The locking part 55 is formed as a space with a size in
which the trim plate 37 may be locked thereinto, and is formed as
an opening of which upper and lower ends are opened and which
extends from the upper end to the lower end.
[0104] Furthermore, the locking part 55 may be formed so that only
one of the upper end and the lower end is opened. In an embodiment,
only the upper end may be opened, and the other-side end thereof
may be closed. The attachment member 50 of which the upper end of
the locking part 55 is opened and the lower end thereof is closed
is particularly suitable for the case where the attachment member
is used only for any one of the right and left side frames 10. The
attachment member 50 of which both the upper end and the lower end
of the locking part 55 are opened are particularly suitable for the
case where the attachment member is used for both right and left
side frames 10. At this time, the upper end side when the
attachment is used for one of the right and left side frames 10
becomes the lower end side when the attachment member is used for
the other side frame 10.
[0105] The groove 53 and the extension portion 54 are perpendicular
to the front wall contact surface 56 and the second wall 60, and
are parallel to the rear wall contact surface 57. The front wall
contact surface 56 is parallel to the second wall 60, and is
perpendicular to the rear wall contact surface 57. Further, the
inner wall 12a stored in the groove 53 and the trim plate 37 stored
in the locking part 55 during the assembly are inclined relative to
each other while an obtuse angle is formed therebetween.
[0106] The front wall contact surface 56, the rear wall contact
surface 57, and the protrusion 60a correspond to the rotation
suppressing portions of embodiments, and the groove 53 and the
protrusion 60a correspond to the retaining portions of
embodiments.
[0107] Since the retaining portion is formed by the protrusion 60a,
the retaining structure may be integrally formed with the
attachment member 50. Accordingly, the manufacturing process may be
easily performed and the rigidity of the second wall 60 and the
protrusion 60a is improved.
[0108] As illustrated in FIG. 6, an end 54e of the extension
portion 54 is located at a position lower than the front wall
contact surface 56 in the depth direction of the groove 53. In this
way, a portion exposed to the outside of the side frame 10 in the
locking portion 52 is shorter than a portion stored in the side
frame 10 in the depth direction of the groove 53, and hence a
portion which may interfere with the cushion pad 5 disposed at the
inside of the side frame 10 at the front side of the seat S is
shortened.
[0109] As illustrated in FIG. 4, the attachment member 50 is
attached to the side frame 10 in a manner such that the attachment
member is inserted into the attachment hole 12h while the trim
plate 37 to which the end of the stay cloth 32 is sewn is retained
inside the locking part 55.
[0110] At this time, a portion near the rear wall contact surface
57 in relation to the groove 53 and the protrusion 60a in the
attachment member 50 is stored in the space inside the side frame
10.
[0111] Further, the front wall contact surface 56 comes into
contact with the rear surfaces of the front walls 12b and 11b, the
rear wall contact surface 57 comes into contact with the surface of
the outer wall 11a at the inside of the seat S, and the protrusion
60a comes into contact with the end of the attachment hole 12h at
the rear side of the seat S in the surface of the inner wall 12a at
the outside of the seat S. In this way, since the front wall
contact surface 56 comes into contact with the rear surfaces of the
front walls 12b and 11b and the rear wall contact surface 57 comes
into contact with the surface of the outer wall 11a at the inside
of the seat S, it is possible to suppress the rotation of the
attachment member 50 about the end of the attachment hole 12h at
the front side of the seat S.
[0112] Furthermore, in this embodiment, the protrusion 60a and the
second wall 60 come into contact with the end of the attachment
hole 12h at the rear side of the seat S, but a gap may be formed
between the second wall 60 and the end of the attachment hole 12h
at the rear side of the seat S.
[0113] Further, in this embodiment, the attachment hole 12h used to
attach the stay cloth 32 is formed in the inner frame 12. However,
a configuration may be employed in which the attachment hole is
provided at a position close to the front wall 11b of the outer
wall 11a of the outer frame 11 and the attachment member 50
connected to the stay cloth 32 is attached to the outer frame
11.
[0114] Further, in this embodiment, the guide member that guides
the deployment direction of the airbag module 6 is provided only
for the inner stay cloth 32 passing through the front side of the
airbag module 6. However, as another example of the guide member, a
configuration may be employed in which an outer stay cloth (not
illustrated) passing between the rear surface of the airbag module
6 and the rear cushion pad 5 is provided, a pair of attachment
holes like the attachment holes 12h is provided at two positions
close to the rear wall 12c of the inner wall 12a instead of the
elongated hole 12s of the side frame 10, and the outer stay cloth
is attached to the attachment holes through the attachment member
50.
[0115] In this case, one-side end of the outer stay cloth is sewn
to the fracture portion 40, the outer stay cloth is drawn from the
fracture portion 40 into the space 7, and the outer stay cloth is
drawn from the surface of the airbag module 6 at the outside of the
seat S along the surface at the rear side of the seat S to the rear
walls 11c and 12c of the side frame 10 while facing the airbag
module 6. The end opposite to the fracture portion 40 is provided
with an attachment portion (not illustrated) like the attachment
portion 36, and a trim plate (not illustrated) is sewn thereto.
[0116] Further, a configuration may be employed in which the
attachment hole for attaching the outer stay cloth is provided at a
position close to the rear wall 11c of the outer wall 11a of the
outer frame 11 and the attachment member 50 connected to the outer
stay cloth is attached to the outer frame 11.
[0117] The attachment of the stay cloth 32 with respect to the side
frame 10 through the attachment member 50 is performed according to
the following procedure.
[0118] An operator first folds the attachment portion 36 of the
stay cloth 32 once at the boundary between the trim plate 37 and
the attachment portion 36, and causes the trim plate 37 and the
attachment portion 36 to overlap each other by the width of the
trim plate 37.
[0119] Next, the attachment portion 36 is inserted into the slit 69
while the trim plate 37 and the attachment portion 36 are held.
Next, the trim plate 37 is inserted and pressed into the locking
part 55 so that the trim plate 37 having the stay cloth 32 attached
thereto is connected to the attachment member 50.
[0120] The attachment members 50 are connected to all attachment
portions 36 by performing the same operation repeatedly on all
attachment portions 36.
[0121] Next, the wide portion 51 of the attachment member 50 is
inserted into the attachment hole 12h of the side frame 10, and the
groove 53 is locked to the wall of the attachment hole 12h at the
front side of the seat S. The second wall 60 is pressed into the
attachment hole 12h, and the protrusion 60a is caused to come into
contact with the wall of the attachment hole 12h at the rear side
of the seat, so that the attachment member 50 is positioned.
[0122] The attachment of the stay cloth 32 with respect to the side
frame 10 through the attachment member 50 is completed by
performing the above-described operation on all attachment members
50.
[0123] In this embodiment, the attachment member 50 with the front
wall contact surface 56 and the rear wall contact surface 57 is
attached to the side frame 10 having the attachment hole 12h formed
in the inner wall 12a, but the present invention is not limited
thereto. As illustrated in FIGS. 7 to 9, an attachment member 50'
which includes a rear wall contact surface 57' and does not include
a front wall contact surface may be attached to a side frame 10'
having an attachment hole 12h' formed from an inner wall 12a' to a
front wall 12b'.
[0124] In the examples of FIGS. 7 to 9, as illustrated in FIG. 7,
the side frame 10' includes an attachment hole 12h' which is formed
at two positions in the up and down direction. The attachment hole
12h' is formed from the inner wall 12a' to the front wall 12b', and
a portion formed in the front wall 12b' is formed in the entire
length of the front wall 12b' in the width direction of the seat S.
The other configurations of the side frame 10' are the same as
those of the side frame 10. The portion from the inner wall 12a' to
the front wall 12b' or the front walls 12b' and 11b' correspond to
the connection positions of the plurality of facing side frame
elements of embodiments.
[0125] As illustrated in FIG. 9, the attachment member 50' includes
a wide portion 51' which has a substantially rectangular
cross-sectional shape substantially following a shape of an inner
surface of a portion having a L-shaped cross-section reaching an
outer wall 11a' from the front wall 11b' of the side frame 10', a
locking portion 52' which is formed near the front wall 11b' of the
wide portion 51', and an extension portion 54' which is formed so
that the end opposite to the wide portion 51' in the locking
portion 52' extends toward the extension side of the stay cloth 32
and is covered by the outer surface of the front wall 11b' at the
front side of the seat S. The attachment member 50' has a
substantially uniform cross-sectional shape in the extension
direction of the side frame 10' in the attachment state.
[0126] In locking portion 52', a groove 53' which extends from the
wide portion 51' to lock the attachment member 50' to the front
wall 11b' is formed at the side of the front wall 11b' of the wide
portion 51'. The groove 53' is formed as a space between the wide
portion 51' and the extension portion 54' extending from the base
portion of the wide portion 51'. The groove 53' is attached to the
end of the attachment hole 12h' at the outside in the width
direction of the seat S, and sandwiches the front wall 11b'.
[0127] The wide portion 51' includes a rear wall contact surface
57' which is perpendicular to the depth direction of the groove
53'.
[0128] The wide portion 51' includes a locking part 55' which locks
the trim plate 37 while retaining the trim plate therein and first
and second walls 59' and 60' which form both wall surfaces of a
slit 69' used as a passage of the stay cloth 32 drawn out from the
locking part 55'.
[0129] The outer surface of the second wall 60' is parallel to the
groove 53' and is perpendicular to the rear wall contact surface
57'. The outer surface of the second wall 60' is provided with a
protrusion 60a' of which a portion near the rear surface contact
surface 57' protrudes outward and serves as a step. The protrusion
60a' extends from the upper end of the attachment member 50' to the
lower end thereof, and is formed in a linear shape in the side
view.
[0130] The groove 53' and the extension portion 54' are
perpendicular to the rear wall contact surface 57' and are parallel
to the second wall 60'. The rear wall contact surface 57' is
perpendicular to the second wall 60'. Further, the front wall 11b'
stored in the groove 53' and the trim plate 37 stored in the
locking part 55' during the assembly are inclined relative to each
other while an acute angle is formed therebetween.
[0131] The other configurations of the attachment member 50' are
the same as those of the attachment member 50.
[0132] As illustrated in FIG. 8, the attachment member 50' is
attached to the side frame 10' in a manner such that the attachment
member is inserted into the attachment hole 12h' while the trim
plate 37 to which the end of the stay cloth 32 is sewn is retained
inside the locking part 55'.
[0133] At this time, a portion near the rear wall contact surface
57' in relation to the protrusion 60a' in the attachment member 50'
is stored in a space inside the side frame 10'.
[0134] Further, a wall surface near the wide portion 51' in the
groove 53' comes into contact with the rear surface of the front
wall 11b', the rear wall contact surface 57' comes into contact
with the surface of the outer wall 11a' at the inside of the seat
S, and the protrusion 60a' comes into contact with the end of the
attachment hole 12h' at the rear side of the seat S in the surface
of the inner wall 12a' at the outside of the seat S.
[0135] Further, in this embodiment, the attachment hole 12h' used
to attach the stay cloth 32 is formed in the inner frame 12'.
However, a configuration may be employed in which the attachment
hole 12h' is formed from the outer wall 11a' of the outer frame 11'
to a rear wall 11c' thereof and the attachment member 50' connected
to the stay cloth 32 is attached to the outer frame 11'.
[0136] Further, in this embodiment, the guide member that guides
the deployment direction of the airbag module 6 is provided only
for the inner stay cloth 32 passing through the front side of the
airbag module 6. However, as another example of the guide member, a
configuration may be employed in which an outer stay cloth (not
illustrated) passing between the rear surface of the airbag module
6 and the rear cushion pad 5 is provided, a pair of attachment
holes like the attachment holes 12h' is provided from the inner
wall 12a' to the rear wall 12c' in the side frame 10' instead of
the elongated hole 12s', and the outer stay cloth is attached to
the attachment holes through the attachment member 50'.
[0137] In this case, one-side end of the outer stay cloth is sewn
to the fracture portion 40, the outer stay cloth is drawn from the
fracture portion 40 into the space 7, and the outer stay cloth is
drawn from the surface of the airbag module 6 at the outside of the
seat S along the surface at the rear side of the seat S to the rear
walls 11c' and 12c' of the side frame 10' while facing the airbag
module 6. The end opposite to the fracture portion 40 is provided
with an attachment portion (not illustrated) like the attachment
portion 36, and a trim plate (not illustrated) is sewn thereto.
[0138] Further, a configuration may be employed in which the
attachment hole for attaching the outer stay cloth is formed from
the outer wall 11a' of the outer frame 11' to the rear wall 11c'
thereof and the attachment member 50' connected to the outer stay
cloth is attached to the outer frame 11'.
[0139] The attachment of the stay cloth 32 with respect to the side
frame 10' through the attachment member 50' is performed according
to the following procedure.
[0140] An operator first folds the attachment portion 36 of the
stay cloth 32 once at the boundary between the trim plate 37 and
the attachment portion 36, and causes the trim plate 37 and the
attachment portion 36 to overlap each other by the width of the
trim plate 37.
[0141] Next, the attachment portion 36 is inserted into the slit
69' while the trim plate 37 and the attachment portion 36 are held.
Next, the trim plate 37 is inserted and pressed into the locking
part 55' so that the trim plate 37 having the stay cloth 32
attached thereto is connected to the attachment member 50'.
[0142] The attachment members 50' are connected to all attachment
portions 36 by performing the same operation repeatedly on all
attachment portions 36.
[0143] Next, the wide portion 51' of the attachment member 50' is
inserted into the attachment hole 12h' of the side frame 10', and
the groove 53' is locked to the wall of the attachment hole 12h' at
the outside of the seat S. The second wall 60' is pressed into the
attachment hole 12h', and the protrusion 60a' is caused to come
into contact with the wall of the attachment hole 12h' at the rear
side of the seat, so that the attachment member 50' is
positioned.
[0144] The attachment of the stay cloth 32 with respect to the side
frame 10' through the attachment member 50' is completed by
performing the above-described operation on all attachment members
50'.
[0145] In the embodiment illustrated in FIGS. 1 to 6 and the
embodiment illustrated in FIGS. 7 to 9, the side frame 10 is formed
by the outer frame 11 and the inner frame 12 each having a shallow
U-shaped cross-section while the end surfaces thereof are fixed to
each other in an abutting state, but a side frame 110 illustrated
in FIG. 10 may be used. An overlapping portion 110d which is formed
by the plate members overlapping each other through bending is
disposed at a position distant from the cushion pad 5 while not
coming into contact with the cushion pad 5.
[0146] The side frame 110 of FIG. 10 is formed in a manner such
that one metallic plate member is bent to form a tubular body
having a rectangular cross-sectional shape in a flat section
structure. Since the other configurations of the seat S equipped
with the airbag module 6 using the side frame of FIG. 10 are the
same as those of the embodiment illustrated in FIGS. 1 to 6 and the
embodiment illustrated in FIGS. 7 to 9, the description thereof
will not be repeated.
REFERENCE SIGNS LIST
[0147] S seat [0148] S1 seat back [0149] S2 seat portion [0150] S3
headrest [0151] F seat frame [0152] 1 seat back frame [0153] 2 seat
frame [0154] 3 reclining mechanism [0155] 4 trim cover [0156] 5
cushion pad [0157] 6 airbag module [0158] 6a inflator [0159] 6b
airbag [0160] 6c retainer [0161] 6d wrapping material [0162] 7
space [0163] 10, 10', 110 side frame [0164] 11, 11' outer frame
[0165] 12, 12' inner frame [0166] 11a, 11a' outer wall [0167] 12a,
12a' inner wall [0168] 11b, 12b, 12b' front wall [0169] 11c, 12c,
12c' rear wall [0170] 12h, 12h' attachment hole [0171] 12s, 12s'
elongated hole [0172] 18 bolt [0173] 21 upper frame [0174] 22 lower
frame [0175] 23 pillar support portion [0176] 32 stay cloth [0177]
33 locking member [0178] 34 edge near fracture portion [0179] 35
edge facing fracture portion [0180] 36 attachment portion [0181] 37
trim plate [0182] 40 fracture portion [0183] 41 front surface
gusset portion [0184] 42 side surface gusset portion [0185] 42e end
edge [0186] 50, 50' attachment member [0187] 51, 51' wide portion
[0188] 52, 52' locking portion [0189] 53, 53' groove [0190] 54, 54'
extension portion [0191] 54e end [0192] 55, 55' locking part [0193]
56 front wall contact surface [0194] 57, 57' rear wall contact
surface [0195] 59, 59' first wall [0196] 60, 60' second wall [0197]
60a, 60a' protrusion [0198] 69, 69' slit [0199] 110 overlapping
portion
* * * * *